Here's what happens when your Tesla Roadster (or any EV) reaches the end of battery life

Here on L.I. a Tesla had an accident and the car was incinerated. I guess the insurance rates for fire will go up on EV's, not only Tesla's. And extinguishment of those fires takes much more time, because they keep reigniting. So now a Fire Dept. Diesel pumper has to keep operating for several hours to extinguish the fire. So what did we save?